US companies will have to prove that their materials are not from conflict zones.
BBC World Service Online
BNP Paribas is facing one of the largest fines ever imposed on a financial firm
Are European politicians facing a crisis of legitimacy?
Diana Furchtgott-Roth, former economic adviser to George W Bush, says it can
Nigerian military leaders locate the schoolgirls abducted by Boko Haram.
Defiant words from President Putin over sanctions.
Kristie Kenney, the US ambassador to Thailand, gives us her reaction to the military coup
Ebay suggests more than 120 million people may have to swap passwords in a security scare
The tricky act of balancing safety with reputational damage for America's auto giant
The Swiss bank is fined $2.6 billion and pleads guilty to helping US citizens evade taxes
India has its Modi moment as the former opposition party leader becomes prime minister
Ukrainian steelworkers take to city streets in the east of the country
Orla Guerin reports from Soma, the scene of Turkey's worst ever mining disaster
Global business news, with live guests and contributions from Asia and the USA.
China agrees to invest in a major African railway system
Apple 'in talks' to buy headphone maker and music-streaming provider, Beats, for $3.2bn.
Chinese and Vietnamese ships smash into each other in a confrontation over territory
Why Russia is off the US's favoured trading nation list
Is French economist Thomas Picketty right to argue higher taxes are the way to fix it?
The BBC's Matthew Davies is in Johannesburg to gauge the mood of voters.
The crisis deepens in Ukraine and western leaders discuss more sanctions.
President Obama calls for new rules to protect Americans' data
The World Health Organisation says we are facing a world antibiotic crisis